It is not clear if Trump will refuse to transfer detainees once he takes office.

The president-elect has promised to keep Guantánamo operating and "load it up with some bad dudes."

Throughout his presidency, Obama has vowed to close the detention center. He submitted a plan to do so to Congress in February, but he has faced objections from Republicans over where the prisoners would go.

When Obama took office, the prison at Guantánamo Bay, Cuba, had 242 detainees.